The influence of radiofrequency electromagnetic fields on the adsorption processes in porous media

The experimental results of the polar hydrocarbon adsorption in saturated porous media after radio-frequency (RF) electromagnetic (EM) influence and the thermal heating for comparison are presented. Temperature dependences of the extracted volume of hydrocarbons from models are shown. Comparing the obtained data an additional influence of RF EM field on the desorption of asphaltenes from the porous media surface has been found, that leads to an increase of the extraction of hydrocarbons from the models. The thermodynamic substantiation and mathematical modeling of heat and mass transfer in a saturated porous media under RF EM influence are used as the basis of theoretical study. The equation of sorption kinetics based on the Henry’s Law includes a summand that represents the contribution of thermal and EM fields is to be considered. Researches have discovered that the adsorption process slows down under RF EM field influence, which has a positive effect on the filtration ability of the saturated rock. Investigation of the field influence on the asphaltene adsorption process using atomic force microscopy (AFM) was conducted to identify the mechanism of adsorption and desorption of polar components on the surface of the porous medium under the RF EM field influence.

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Enhanced decolorization of dyes by an iron modified clay and thermodynamic parameters

Water Science & Technology ◽

10.2166/wst.2016.038 ◽

2016 ◽

Vol 73 (8) ◽

pp. 2007-2016 ◽

Cited By ~ 3

Author(s):

N. Contreras Olivares ◽

M. C. Díaz-Nava ◽

M. Solache-Ríos

Keyword(s):

Thermodynamic Parameters ◽

Adsorption Process ◽

Sorption Kinetics ◽

Homogeneous Material ◽

Modified Clay ◽

Adsorption Capacities ◽

Adsorption Processes ◽

Kinetics And Isotherms ◽

Material Temperature ◽

Maximum Removal

The sorption processes of red 5 (R5) and yellow 5 (Y5) dyes by iron modified and sodium bentonite in aqueous solutions was evaluated. The modified clay was prepared, conditioned and characterized. The sodium clay did not remove any of either dye. The sorption kinetics and isotherms of R5 and Y5 dyes by iron modified clay were determined. The maximum removal percentages achieved were 97% and 98% for R5 and Y5, respectively, and a contact time of 72 h; the experimental data were best adjusted to Ho model. The isotherms of both dyes were best adjusted to the Langmuir model and the maximum adsorption capacities of the modified clay were 11.26 mg/g and 5.28 mg/g for R5 and Y5, respectively. These results indicate that adsorption processes have a high probability to be described as chemisorption on a homogeneous material. Temperature range between 283 and 213 K does not affect the adsorption of Y5 by the iron modified clay, but the adsorption process of R5 was affected, and the thermodynamic parameters could be calculated, which indicate a chemisorption mechanism.

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Experimental Investigation of an Intensified Heat Transfer Adsorption Bed (IHTAB) Reactor Prototype

Materials ◽

10.3390/ma14133520 ◽

2021 ◽

Vol 14 (13) ◽

pp. 3520

Author(s):

Karolina Grabowska ◽

Anna Zylka ◽

Anna Kulakowska ◽

Dorian Skrobek ◽

Jaroslaw Krzywanski ◽

...

Keyword(s):

Heat Transfer ◽

Experimental Investigation ◽

Porous Media ◽

Silica Gel ◽

Pressure Difference ◽

Fluidized Beds ◽

Adsorption Process ◽

Fixed Bed ◽

Adsorption Chiller ◽

Adsorption Processes

The first experience in the operation of intensified heat transfer adsorption bed reactor designed for low-pressure adsorption processes is presented in this paper. This work aims to assess the possibility of fluidizing the porous media bed induced by the pressure difference between the evaporator and the adsorption reactor. The conducted experimental research allowed indicating the type of silica gel recommended to use in fluidized beds of adsorption chiller. The fixed bed of silica gel was observed for the lower pressure differences, while fluidization appeared in the case of the pressure difference between the evaporator and the adsorption chamber higher than 1000 Pa. The most significant differences in the adsorption process between the fixed bed and the fluidized bed are revealed in the changes of sorbent temperatures. The silica gel bed was fluidized with water vapor generated in the evaporator.

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Flow and Solute Transport in Saturated Porous Media: 1. The Continuum Hypothesis

Journal of Porous Media ◽

10.1615/jpormedia.v11.i4.60 ◽

2008 ◽

Vol 11 (4) ◽

pp. 403-413 ◽

Cited By ~ 30

Author(s):

Amgad Salama ◽

Paul J. Van Geel

Keyword(s):

Porous Media ◽

Solute Transport ◽

Continuum Hypothesis ◽

Saturated Porous Media ◽

The Continuum

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Evidence of the concentration dependent ionic diffusivity through saturated porous media

RILEM International Workshop on Chloride Penetration into Concrete ◽

10.1617/2912143454.009 ◽

1997 ◽

Author(s):

Keyword(s):

Porous Media ◽

Saturated Porous Media ◽

Ionic Diffusivity

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COUPLING FINITE ELEMENTS APPLIED TO HYDRAULIC ANALYSIS IN SATURATED POROUS MEDIA

10.26678/abcm.cobem2019.cob2019-1863 ◽

2019 ◽

Author(s):

Murilo Camargo ◽

Pedro Cleto ◽

Eduardo Alexandre Rodrigues ◽

Heber Agnelo Antonel Fabbri ◽

Osvaldo Luís Manzoli

Keyword(s):

Porous Media ◽

Finite Elements ◽

Saturated Porous Media ◽

Hydraulic Analysis

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Documentation of computer program VS2Dh for simulation of energy transport in variably saturated porous media: Modification of the US Geological Survey's computer program VS2DT

10.3133/wri964230 ◽

1996 ◽

Cited By ~ 1

Keyword(s):

Porous Media ◽

Computer Program ◽

Energy Transport ◽

Saturated Porous Media ◽

The Us

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Experimental study of the supercritical CO 2 diffusion coefficient in porous media under reservoir conditions

Royal Society Open Science ◽

10.1098/rsos.181902 ◽

2019 ◽

Vol 6 (6) ◽

pp. 181902 ◽

Cited By ~ 1

Author(s):

Junchen Lv ◽

Yuan Chi ◽

Changzhong Zhao ◽

Yi Zhang ◽

Hailin Mu

Keyword(s):

Porous Media ◽

Diffusion Coefficient ◽

Oil Recovery ◽

Carbon Capture ◽

Carbon Capture And Storage ◽

Elevated Pressure ◽

Experimental Results ◽

Saturated Porous Media ◽

Reservoir Conditions ◽

The Impact

Reliable measurement of the CO 2 diffusion coefficient in consolidated oil-saturated porous media is critical for the design and performance of CO 2 -enhanced oil recovery (EOR) and carbon capture and storage (CCS) projects. A thorough experimental investigation of the supercritical CO 2 diffusion in n -decane-saturated Berea cores with permeabilities of 50 and 100 mD was conducted in this study at elevated pressure (10–25 MPa) and temperature (333.15–373.15 K), which simulated actual reservoir conditions. The supercritical CO 2 diffusion coefficients in the Berea cores were calculated by a model appropriate for diffusion in porous media based on Fick's Law. The results show that the supercritical CO 2 diffusion coefficient increases as the pressure, temperature and permeability increase. The supercritical CO 2 diffusion coefficient first increases slowly at 10 MPa and then grows significantly with increasing pressure. The impact of the pressure decreases at elevated temperature. The effect of permeability remains steady despite the temperature change during the experiments. The effect of gas state and porous media on the supercritical CO 2 diffusion coefficient was further discussed by comparing the results of this study with previous study. Based on the experimental results, an empirical correlation for supercritical CO 2 diffusion coefficient in n -decane-saturated porous media was developed. The experimental results contribute to the study of supercritical CO 2 diffusion in compact porous media.

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